WO2004046808A1 - 電子閃光装置用反射鏡及び電子閃光装置 - Google Patents
電子閃光装置用反射鏡及び電子閃光装置 Download PDFInfo
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- WO2004046808A1 WO2004046808A1 PCT/JP2003/014378 JP0314378W WO2004046808A1 WO 2004046808 A1 WO2004046808 A1 WO 2004046808A1 JP 0314378 W JP0314378 W JP 0314378W WO 2004046808 A1 WO2004046808 A1 WO 2004046808A1
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- Prior art keywords
- center
- pair
- reflecting
- flash device
- intersection
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0503—Built-in units
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0564—Combinations of cameras with electronic flash units characterised by the type of light source
- G03B2215/0578—Flashtube mounting
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0582—Reflectors
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0589—Diffusors, filters or refraction means
- G03B2215/0592—Diffusors, filters or refraction means installed in front of light emitter
Definitions
- the present invention relates to a reflector used for an electronic flash device for irradiating a subject with direct light radiated from a light source and reflected light reflected by a reflecting surface, and an electronic flash device using the reflector. is there. Background art
- the reflecting mirror 1 has a light source housing 3 in the center where a light source 2 is housed, and an upper surface 4 and a lower surface formed continuously on both sides of the light source housing 3 in a direction intersecting the longitudinal direction. 5
- the light source storage section 3 has a cylindrical cylindrical surface portion formed with the center O of the stored light source 2 as the center of the radius of curvature, and the inner surface of the cylindrical surface portion serves as a second reflection surface 3a. I have.
- the inner surfaces of the upper surface 4 and the lower surface 5 are first reflecting surfaces 4a and 5a. These first reflecting surfaces 4a and 5a are formed vertically symmetrically with respect to the center plane L of the upper surface portion 4 and the lower surface portion 5 which form a pair vertically.
- An imaginary plane 7 including a continuous portion 6, 6 where the light source housing 3 of the reflector 1 and the upper and lower surfaces 4, 5 are continuous is located on the rear side of the center O of the light source 2 by a distance M (for the reflector 1). (The side opposite to the opening 8). According to such a reflecting mirror 1, the light N emitted from the light source 2 is emitted forward from the opening 8 at a light distribution angle a (for example, 45 degrees) as shown in the figure.
- a for example, 45 degrees
- Patent Document 2 discloses that This document describes a front grille with a built-in lamp, which is located between the headlights arranged on the left and right sides of the unit and can reduce the number of parts, assembly and assembly steps by incorporating the lamp.
- This lamp-integrated front grill is a lamp-integrated front grill that is located between the headlights that are located on the left and right of the front of the vehicle body, is long to the left and right, and has front openings at both left and right ends.
- a body having an inner surface as a reflecting surface, a lens attached to the body so as to cover a front surface thereof, and a light bulb attached to the recessed portion of the body.
- the body has a lower space larger than the upper part in a portion other than the reflecting recess, and a lens step is formed in the entire lens. Further, the opening edge of the reflecting recess is a light source portion of the light bulb. In a position that does not block light to direct the end of the Luo lens is characterized and this.
- the size of the opening 8 of the pair of first reflecting surfaces 4a and 5a is wide, and the light distribution angle ⁇ is considered.
- the depth is too large to allow the direct light radiated from the opening 8 to fall within a predetermined light distribution angle because of not being cut off, and there has been a problem that the electronic flash device cannot be made thinner and smaller.
- the light distribution angle is reduced by using a protector, there is a certain limit to this, and there is also a problem that the radiation efficiency is poor because there is light emitted outside the light distribution angle.
- the reflected light cannot be used effectively, so that it is difficult to reduce the size of the opening while maintaining the predetermined optical performance.
- the size of the opening Some methods have a smaller size, but in that case, it is necessary to use a protector with a special aspherical lens system and use it as a unit, which makes the structure complicated and expensive. There was o
- the present invention has been made in order to solve such a conventional problem, and devises a shape of a second reflecting surface or the like that reflects light radiated backward from a light source, and provides all or all of the reflected light. Most of the light is emitted forward from the opening at a predetermined light distribution angle, so that it is possible to reduce the thickness and size of the electronic flash device while maintaining the predetermined optical performance.
- An object of the present invention is to provide a mirror and an electronic flash device using the reflecting mirror. Disclosure of the invention
- a reflecting mirror for an electronic flash device comprises: a pair of first reflecting surfaces formed of a part of a cylindrical curved surface and facing each other; A second reflecting surface which is continuous with the reflecting surface of the light source and in which the light source is housed inside; and a continuous portion in which the pair of the first reflecting surface and the second reflecting surface are housed. It is characterized in that it is set on the side of the opening 'of the pair of first reflecting surfaces from the center of the light source.
- the electronic flash device of the present application is an electronic flash device comprising: a light source; and a reflecting mirror for reflecting light emitted from the light source on a reflecting surface thereof.
- a pair of first reflecting surfaces that are opposed to each other, and a second reflecting surface that is continuous with the pair of first reflecting surfaces and that accommodates a light source in a central portion.
- a continuous portion where the reflection surface and the second reflection surface are continuous is set on the opening side of the pair of first reflection surfaces from the center of the housed light source.
- the continuous portion of the pair of first reflecting surface and the second reflecting surface is connected to the pair of first and second reflecting surfaces from the center of the light source housed in the second reflecting surface.
- the reflection surface on the opening side of the reflecting surface By setting the reflection surface on the opening side of the reflecting surface, all or most of the reflected light can be emitted forward from the opening at a predetermined light distribution angle, and electrons can be maintained while maintaining the predetermined optical performance.
- the flash device can be made thinner and smaller. Further, the light emitted from the light source is reflected at least once by using the second reflecting surface, so that the amount of light traveling forward can be increased to efficiently emit the light, and the light distribution angle of the light emitted from the light source can be reduced. Adjustment can be performed easily and reliably.
- a pair of first and second reflecting surfaces is provided on a reflecting mirror that reflects light emitted from a light source.
- a reflecting mirror that reflects light emitted from a light source.
- FIG. 1 is an explanatory view showing a cross section of a first embodiment of a reflector for an electronic flash device of the present invention.
- FIG. 2A illustrates the optical path of the reflector for an electronic flash device according to the first embodiment shown in FIG. 1, and is an explanatory diagram showing a state where light is directly radiated forward.
- FIG. 2B is also a view for explaining the optical path of the reflecting mirror for the electronic flash device, and is a view showing a state where light is primarily reflected on a parallel plane.
- FIG. 2C is also a view for explaining the optical path of the reflecting mirror for the electronic flash device, and is a diagram illustrating a state where light is primarily reflected on the front cylindrical surface.
- FIG. 3A is also a view for explaining the optical path of the reflecting mirror for an electronic flash device, and is an explanatory view showing a state where light is reflected by a first reflecting surface.
- FIG. 3B is also a view for explaining the optical path of the reflector for an electronic flash device, and is an explanatory view showing a state where light is primarily reflected on an inclined plane.
- FIG. 3C illustrates the optical path of the reflecting mirror for an electronic flash device in the same manner, and is an explanatory view showing a state where light is primarily reflected on a parallel plane.
- FIG. 4 is an explanatory view showing a cross section of a second embodiment of the reflector for an electronic flash device of the present invention.
- FIG. 5 is an explanatory view showing a cross section of a third embodiment of the reflector for an electronic flash device of the present invention.
- FIG. 6 is an explanatory view showing a cross section of a fourth embodiment of the reflector for an electronic flash device of the present invention.
- FIG. 7 is an explanatory view showing a cross section of a fifth embodiment of the reflector for an electronic flash device of the present invention.
- FIG. 8 is an exploded perspective view showing one embodiment of the electronic flash device having the first embodiment of the reflector for the electronic flash device of the present invention.
- FIG. 9 is a perspective view showing an assembled state of one embodiment of the electronic flash device of the present invention shown in FIG.
- FIG. 10 is a perspective view of one embodiment of an electronic apparatus to which the electronic flash device of the present invention shown in FIG. 9 is applied, in which the lens cover is opened.
- FIG. 11 is a perspective view showing a state where the lens power par of the electronic still camera shown in FIG. 10 is closed.
- FIG. 12 is an explanatory diagram showing an example of a conventional reflecting mirror. BEST MODE FOR CARRYING OUT THE INVENTION
- embodiments of a reflector for an electronic flash device of the present invention and an electronic flash device provided with the reflector will be described with reference to the accompanying drawings.
- an electronic flash device 10 As shown in FIG. 8, an electronic flash device 10 according to the present invention comprises a protector 11, a xenon tube 12 as a light source, a reflector 13 and a holder 14. , A shield rubber 15, and a flexible printed wiring board (hereinafter referred to as “flexible board”) 16.
- the reflecting mirror 13 is composed of a pair of upper and lower surfaces 20 and 21 each formed of a part of a substantially cylindrical curved surface opposed to each other, and a pair of left and right opposed surfaces. It is composed of side portions 22 and 22 and a light source storage portion 23 connected to the back side thereof.
- the upper and lower portions 20 and 21 and the left and right side portions 22 and 22 have a cross-sectional shape like a substantially trumpet whose opening 13a side is widened by narrowing the back side.
- the upper and lower surfaces 20 and 21 and the light source housing 23 are arranged vertically with respect to the center plane L as shown in FIG. The shape is symmetrical.
- the inner surfaces of the upper and lower surfaces 20 and 21 constitute a pair of first reflecting surfaces 24 and 25 which are vertically opposed to each other, and the inner surface of the light source housing 23 is a second reflecting surface 2. 6 is composed.
- the pair of first reflecting surfaces 24, 25, the second reflecting surface 26, and the third reflecting surface, which is the inner surface of the left and right side portions 22, 22, are designed to reflect light well. For example, it is formed by performing mirror finishing or the like.
- the first reflecting surfaces 24 and 25 are each formed as a part of a cylindrical curved surface that is substantially cylindrical as a whole.
- the cross-sectional shape of the first reflecting surfaces 24 and 25 is not limited to this embodiment, and may be, for example, a circle, an ellipse, a parabola, a quadratic curve, a cubic curve, or the like. Can be applied.
- the left and right side portions 22 and 22 may be curved surfaces having an appropriate radius of curvature, or may be flat surfaces inclined at an appropriate angle.
- Holes 23a having the same shape as the second reflection surface 26 are opened on both side surfaces of the light source housing 23 (see FIG. 8).
- the xenon tube 12 By inserting and removing the xenon tube 12 from this hole 23a, it is provided at the center ⁇ of the light source accommodating portion 23, and the inner surface thereof becomes the central hole 28 forming the second reflecting surface.
- Xenon tube 12 is detachably mounted.
- the inner diameter of the center hole 28 is set to be substantially the same as the outer diameter of the xenon tube 12 so that the xenon tube 12 fits into the center hole 28 with almost no play. .
- the xenon tube 12 as a light source is covered by the second reflecting surface 26 so as to surround the surroundings beyond 180 degrees, and the first reflecting surfaces 24 and 2 are further covered.
- each of the concave portions 37, 37 forming a short gap is also formed.
- the second reflecting surface 26, which is the inner surface of the central hole 28, is different from the first reflecting surfaces 24, 25, and has a cylindrical shape obtained by setting its center O to the center of the radius of curvature R. It is formed in a non-cylindrical shape in which a flat portion is provided in a part of the cylindrical surface portion.
- the second reflecting surface 26 is composed of a pair of upper and lower front cylindrical surfaces 30, 31 and a rear cylindrical surface 32, a pair of upper and lower parallel planes 33, 34, and a pair of upper and lower inclined planes 35. , 36.
- a pair of upper and lower front cylindrical surfaces 30 and 31 and a rear cylindrical surface 32 form a half of the diameter of the xenon tube 12 around the center O of the central hole 28.
- An arc with a radius of curvature R is formed of a cylindrical curved surface that is continuous in the axial direction.
- the surface on the Y-axis) is the front cylindrical surface 30 and 31 on the front side of 38, and the extension of the line connecting the center O and each of the continuous parts B 1 and B 2 is a cylindrical curved surface.
- the rear side from the intersection is the rear cylindrical surface 32.
- a pair of parallel planes 33, 34 is a vertical plane passing through the center O of the central hole 28 and developing in a direction perpendicular to the central plane L (a plane on the Y axis which is a direction orthogonal to the X axis).
- 38 and a pair of front cylindrical surfaces 30 and 31 extend tangentially from the vertical intersections C1 and C2, which intersect each other, and extend from the vertical intersections C1 and C2.
- the second intersections E1 and E2 intersecting the pair of inclined planes 35 and 36 are formed as planes having the other ends.
- the upper and lower vertical intersections C l and C 2 are most preferably points on the vertical plane 38, but are not limited thereto, and may be set slightly forward. Also, it may be set slightly behind.
- the parallel planes 33 and 34 do not strictly mean that they are parallel to the center plane L.
- the vertical intersections C 1 and C 2 may be set at positions displaced from the vertical plane 38 to the opening 13 a side. In this case, the parallel plane is closer than the opening 13 a side. The back side becomes wider.
- the vertical intersections C1, C2 may be set at positions displaced from the vertical plane 38 to the rear side. In this case, the parallel plane is more open than the rear side. The part 13a side becomes wider.
- the pair of inclined planes 35 and 36 are formed by continuous portions B 1 and B 2 where the pair of first reflecting surfaces 24 and 25 intersect with the pair of front cylindrical surfaces 30 and 31, and the central hole 28.
- the first intersections D 1 and D 2 where the extension of the line connecting the center O of the first and the rear cylindrical surface 32 intersect are tangentially extended, and a pair of inclined planes 35 and Second intersection E 1 that intersects 3 6 And E 2 as the other end.
- the second intersections E l and E 2 are not limited to the positions shown in FIG. 1 as in the case of the vertical intersections C l and C 2, but are located at the positions of the vertical intersections C l and C 2. Correspondingly, it can be appropriately displaced in the front-rear direction.
- MIRO trademark
- the material of the reflector 13 is not limited to this, and various materials can be used as long as the material has a high total reflectance to light.
- a xenon tube 12 as a light source is composed of a cylindrical lamp 12a filled with high-pressure xenon gas and electrode terminals 12b, 12b protruding from both ends of the lamp 12a. Have. When this xenon tube 12 is inserted into the central hole 28 of the reflecting mirror 13, both ends of the electrode terminals 12 b, 12 b at both ends and the lamp 12 a are placed on both sides of the light source housing 23. It protrudes sideways from the part.
- the reflecting mirror 13 to which the xenon tube .12 is mounted is mounted on a holder 14 disposed on the back surface thereof.
- the holder 14 is a gutter-shaped member having a substantially U-shaped cross section, and is surrounded by a back surface 14 a and upper surface 14 b and lower surface 14 c connected to both ends thereof.
- the light source accommodating portion 23 of the reflecting mirror 13 is inserted into the recess 39, and is fitted.
- the upper surface 14b and the lower surface 14c of the holder 14 are provided with an engagement claw 40 for engaging and holding the protector 11 and the protector 11 at a predetermined depth.
- a plurality of positioning projections 41 are provided.
- an ABS resin (Atari Ronii) (Trill, butadiene, styrene resin) is preferable, but not limited thereto, and other plastics can be used, as well as metals other than plastics.
- the holder 14 and the reflecting mirror 13 are tightened by a shield rubber 15 and are integrally fixed.
- the shield rubber 15 is composed of a pair of support portions 15a and 15a that support both ends of the xenon tube 12 and a connection portion 15b that connects the two support portions 15a and 15a. And are integrally formed of a material having elasticity.
- Each of the pair of support portions 15a, 15a is provided with a support hole 15c into which each end of the xenon tube 12 is inserted.
- a material of the shield rubber 15 for example, silicone rubber is suitable, but it goes without saying that other rubber-like elastic members can be used.
- a flexible plate 16 for electrically connecting the shield rubber 15 to a power supply for supplying power to the xenon tube 12 is provided on the rear surface.
- the flexure plate 16 has electrode terminals 16a, 16a connected to the electrode terminals 12b, 12b protruding at both axial ends of the xenon tube 12, and a reflector 13 It has a ground terminal section 16b connected to the By connecting these terminal portions 16 a, 16 a and 16 b to the electrode terminals 12 b, 12 b and the reflecting mirror 13, electrical connection is made.
- a protector 11 made of a transparent material is detachably attached to the front of the reflector 13.
- the electrode terminals 12b, 12b are composed of a force par portion lib, 11b covering the outside of the electrode terminals 12b, and a Fresnel lens portion 43 is provided on the front surface.
- Engagement holes 44 are provided on the upper and lower surfaces of the main body 11a to be engaged with the upper and lower engagement claws 40 of the holder 14, respectively. I have.
- the electronic flash device 10 having such a configuration can be easily assembled, for example, as follows. First, a xenon tube 12 as a light source is attached to the light source storage section 23 of the reflector 13. This is performed by inserting the xenon tube 12 into the hole 23a of the light source housing portion 23 from the side, and projecting the electrode terminals 12b and 12b from both ends.
- the light source storage portion 23 of the reflecting mirror 13 is fitted into the concave portion 39 of the holder 14, and the reflecting mirror 13 is supported by the holder 14.
- the ground terminal portion 16 b of the flexible plate 16 is electrically connected to the holder 14 in advance.
- the electrode terminals 16 a, 16 a at both ends of the brake plate 16 are connected to the electrode terminals 12 b, 2 x of the xenon tube 12.
- the electrode terminals 12b and 16a are electrically connected by soldering. Then, attach the protector 11 to the front of the reflector 13. As a result, as shown in FIG. 9, the assembling work is completed and the electronic flash device 10 is obtained.
- the maximum light distribution angle ⁇ is set to 45 degrees (the upper light distribution angle is 22.5 degrees and the lower light distribution angle ad is also 22.5 degrees), and the xenon tube is set.
- the center O of 1 2 is the focal point of the rear cylindrical surface 32.
- Fig. 2A shows the aperture of the light emitted from the center O of the xenon tube 12
- the light S 1 S1 is the light that goes directly to 3a and is within the upper light distribution angle au. And the optical path of the light S2 within the range of the lower light distribution angle ad.
- the light S 1 and the light S 2 are in a range from the point A 1 to the point A 2 at the tip of the opening 13 a side of the pair of first reflecting surfaces 24 and 25, that is, the maximum distribution.
- the light S 3 traveling to the rear side within the angle range of the maximum light distribution angle ⁇ is the first intersection of the upper side of the rear cylindrical surface 32. Irradiation is performed between the section D 1 and the lower first intersection D 2. From the upper first intersection D1 to the lower first intersection D2, the radius of curvature R (the xenon tube 1 2) is centered on the center ⁇ which is the focal point of the rear cylindrical surface 32. Since the light S 3 is incident on the rear cylindrical surface 32, the light S 3 that has entered the rear cylindrical surface 32 returns as it is along the optical path that has passed, and becomes reflected light toward the opening 13 a side.
- ⁇ 2 B is the light emitted from the center O of the xenon tube 12, which is the light traveling toward the second reflection surface 26, and from the upper vertical intersection C 1 to the upper second intersection E 1 (The lower parallel plane 34 between the lower vertical intersection C 2 and the lower second intersection E 2 is illuminated on the upper parallel plane 3 3 This is the same as above.) This shows the optical path of S4.
- the light S 4 emitted from the center O of the xenon tube 12 is incident on the upper parallel plane 33 at an angle to the rear side, so that the reflected light is further inclined to the rear side to the rear side. It is incident on the cylindrical surface 32 '.
- the light incident on the rear cylindrical surface 32 changes its direction to the opening 13a according to the angle of incidence, and is reflected, and within the range of the lower light distribution angle ad, the opening 13a
- the radiation proceeds forward from the opening 13a.
- FIG. 2C shows light emitted from the center O of the xenon tube 12 and traveling toward the second reflecting surface 26, from the upper continuous portion B1 to the upper vertical intersection C1.
- Light illuminating the upper front cylindrical surface 30 between The light emitted to the lower front cylindrical surface 31 between the connecting portion B2 and the lower vertical intersection C2 is the same because it has a vertically symmetric shape. This shows the optical path of S5.
- the light S5 emitted from the center O of the xenon tube 12 is radiated perpendicularly to the upper front cylindrical surface 30, so that the reflected light returns to the opposite side through the optical path as it has passed, It is incident on the lower parallel plane 34.
- the light incident on the lower parallel plane 34 is further reflected to the rear side and is incident on the rear cylindrical surface 32.
- the light incident on the rear cylindrical surface 32 changes its direction toward the opening 13a in accordance with the angle of incidence and is reflected.
- the light enters the opening 13a within the range of the lower light distribution angle ad. It proceeds and is emitted forward from its opening 13a.
- FIG. 3A shows the light emitted from the center O of the xenon tube 12 and the first light from the point A1 to the upper continuous portion B1 of the light traveling toward the opening 13a.
- the light illuminating the lower first reflecting surface 25 from point A 2 to the lower intersecting portion B 2 is the same because it has a vertically symmetric shape)
- the range from the point A 1 to the upper continuous part B 1 (from the point A 2 to the lower continuous part B 2)
- the light S8 heading to the rear side in the parentheses is emitted from the upper first intersection D1 to the lower first intersection D2 of the rear cylindrical surface 32. Accordingly, the light S 8 incident from the upper first intersection D 1 of the rear cylindrical surface 32 to the lower first intersection D 2 returns along the optical path that has passed through, and the upper first The light is reflected by the reflecting surface 24 (the same applies to the lower first reflecting surface 25), and is emitted forward from the opening 13a.
- FIG. 3B shows the light emitted from the center O of the xenon tube 12 and the light traveling toward the second reflection surface 26 side, and from the upper second intersection E 1 to the upper first light.
- the light S9 emitted from the center O of the xenon tube 12 is incident on the upper inclined plane 35 while being inclined, so that the reflected light is directed toward the opening 13a according to the incident angle. It changes direction and is reflected. Then, the light is reflected by the lower first reflecting surface 25 in the front and changes its direction upward, and is emitted forward from the opening 13 a within the range of the light distribution angle ⁇ .
- the reflected light returns along the optical path that has passed through and returns to the opposite side. Head for. Further, the reflected light is reflected by the lower first reflection surface 25 in front and turns upward. Then, the light travels toward the focal point T and is radiated forward from the opening 13a.
- FIG. 3C shows the light exiting from the center O of the xenon tube 12 and traveling toward the second reflection surface 26 side, from the upper vertical intersection C1 to the upper second intersection E.
- Light illuminating the upper parallel plane 3 3 up to 1 (the lower parallel plane between the lower vertical intersection C 2 and the lower second intersection E 2)
- the light applied to the surface 34 is the same because it has a vertically symmetric shape.
- S 1 1 and the light illuminating the lower front cylindrical surface 31 between the lower continuation section B 2 and the lower vertical intersection C 2 (from the upper continuation section B 1 to the upper vertical intersection C 1) The same applies because the light irradiated on the upper front cylindrical surface 30 has a vertically symmetrical shape.
- the reflected light changes its direction to the rear side according to the incident angle. Reflected.
- the reflected light is incident on the rear cylindrical surface 32, and is reflected by changing its direction toward the opening 13a in accordance with the incident angle. Then, the light proceeds to the opening 13a side, and is emitted forward from the opening 13a within the range of the light distribution angle ⁇ .
- the light S 12 emitted from the center O of the xenon tube 12 is perpendicularly incident on the lower front cylindrical surface 31, the reflected light returns through the optical path as it passes and is opposed Head to the side. Then, after being incident on the upper parallel plane 3 3, it passes through the same optical path as the light 11 described above, and changes its traveling direction to the front through the upper parallel plane 3 3 and the rear cylindrical surface 3 2, Radiated forward from opening 13a.
- the light radiated directly forward from the xenon tube 12 which is the light source is reflected directly or on the first reflecting surfaces 24 and 25, and There is no change because the light is radiated forward, but the light radiated backward from the xenon tube 12 is greatly enhanced in reflection efficiency by the second reflecting surface 26.
- the rear cylindrical surface 32 from the upper first intersection D1 to the lower first intersection D2 has a range of 0 to ⁇ 2 degrees. It is reflected up to 2.5 degrees. Also, the light enters the upper parallel plane 33 from the upper vertical intersection C 1 to the upper second intersection E 1 and the lower parallel plane 34 from the lower vertical intersection C 2 to the lower vertical intersection E 2. Light is primarily reflected by the rear cylindrical surface 32 and then Either directly or as a secondary reflection on the first reflecting surfaces 24 and 25, it is emitted forward.
- the light incident on the plane 36 is reflected on the side of the opening 13a on the plane, and is directly radiated or secondarily reflected on the first reflection surfaces 24 and 25 and emitted forward.
- the upper continuous portion; incident on the upper front cylindrical surface 30 from B 1 to the upper vertical intersection C 1 and the lower front cylindrical surface 3 1 from the lower continuous portion B 2 to the lower vertical intersection C 2 The reflected light is primarily reflected by the upper and lower parallel planes 33, 34 or the inclined planes 35, 36, and then secondary by the rear cylindrical surface 32 or the first reflecting surface 24, 25.
- the light is reflected and, if necessary, repeated as a tertiary reflection or higher, and is all radiated to the outside from the front opening 13a.
- heat conversion due to reflection and absorption inside the reflecting mirror 13 can be minimized and output to the outside, so that much light can be used as effective light. Therefore, according to the present embodiment, it is possible to efficiently radiate the direct light and the reflected light all within a predetermined light distribution angle.
- Tables 1, 2, 3 and 4 show the test results of the above-described examples.
- a Xenon tube with a Gno (grade number) of 5,66 F, a light source of 1.8 mm in diameter, a total length of 20 mm, and an arc length of 11 ⁇ 0.5 mm was used.
- a protector made of acrylic resin was used.
- Table 1 shows the contents of Table 2 in a graph
- Table 3 shows the contents of Table 4 in a graph.
- the horizontal angle of the electronic flash device 10 is set, and in the vertical direction, the exposure (EV) is set.
- the exposure (EV) is based on a value of 0 as a reference value, —1.0 is 1/2 of the reference value, and 12.0 is 1 Z 2 of the reference value.
- Table 2 shows values obtained by measuring the exposure amount (EV) at each vertical position with respect to the center plane L.
- Table 4 shows that the center of the electronic flash device 10 is set to the reference value of 0 degree, It shows the measured value of the exposure (EV) at the angular position. For example, the measured value at a position at an upward angle of 10 degrees was 0.15, and the measured value at a position at a left angle of 15 degrees was 10.024.
- FIG. 4 shows a second embodiment of the reflector according to the present invention.
- the reflecting mirror 46 is configured such that the light source storage section 23 having a substantially circular cross section in the above embodiment is a light source storage section 47 having an elliptical (oval) cross section.
- the light source accommodating portion 47 is provided with a flat portion 48 a by extending the parallel plane (the plane from the front vertical intersection C 1 to the rear vertical intersection C 2) in the above embodiment along the center plane L. , 48b (front upper vertical intersection CIa to rear upper vertical intersection C1b, front lower vertical intersection C2a to rear lower vertical intersection C2b).
- the other configuration is the same as that of the above-described embodiment.
- the xenon tube 12 as a light source is moved in the optical axis direction. Adjustment of the mounting position is possible. Therefore, the light distribution angle can be adjusted by moving the mounting position of the xenon tube 12 relatively back and forth with respect to the reflecting surface. Further, the xenon tube 12 can be moved back and forth in conjunction with the zoom operation of the force camera. In such a case, the irradiation angle can be changed in accordance with the zoom operation.
- the inner surfaces of the plane portions 48a and 48b are, of course, reflective surfaces like the other surfaces.
- FIG. 5 shows a third embodiment of the reflecting mirror according to the present invention.
- the reflecting mirror 50 has a configuration in which the parallel planes 33 and 34 are extended to the opening 13a side without the front cylindrical surfaces 30 and 31 in the above embodiment, and the parallel planes 33 and 34 are formed. Are parallel to the first reflecting surfaces 24 and 25 to form parallel planes 51 and 52. First reflection The surfaces 24 and 25 are obtained as curved surfaces formed by setting the center O of the light source as the center of the radius of curvature. Since other configurations are the same as those of the above-described embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted.
- the parallel planes 33, 34 a portion between the upper continuous portion B1 and the upper vertical intersection C1 (from the lower continuous portion B2 to the lower vertical intersection C1). The same applies to the area up to C2.
- the light S13 emitted from the center O of the xenon tube 12 is irradiated to the portion on the opening 13a side from the vertical plane 38,
- the light is incident, for example, on the lower parallel plane 52 while being inclined (the same applies to the upper parallel plane 51). Therefore, the reflected light is reflected from the upper and lower parallel planes 51, 52 and the first reflecting surfaces 24, 25 or more, depending on the angle of incidence, to the primary, secondary, or higher, so that the opening is formed.
- the light travels to the 13a side, and is emitted forward from the opening 13a within the range of the light distribution angle.
- FIG. 6 shows a fourth embodiment of the reflecting mirror according to the present invention.
- This reflecting mirror 60 is configured such that the second reflecting surface 26 in the first embodiment is formed in an elliptical shape. According to the fourth embodiment,
- the second reflecting surface 61 is also set on the inner surface of the light source housing 62, and is configured such that the X-axis side has a long diameter and the Y-axis side has a short diameter. Since other configurations are the same as those of the above-described embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted. According to the fourth embodiment having such a configuration, the same effect as the above embodiment can be obtained.
- FIG. 7 shows a fifth embodiment of the reflecting mirror according to the present invention.
- This reflecting mirror 80 is an embodiment in which the shape of the second reflecting surface is modified by changing the structure of the light source housing section 23 in the first embodiment. That is, the reflecting mirror 80 is composed of an upper surface 20, a lower surface 21, left and right side surfaces 22, and a light source housing 81, but the upper surface 20, the lower surface 21, and the left and right sides.
- the side surface portion 22 of the second embodiment is the same as the second reflection surface 8 2 which is the inner surface of the light source accommodating portion 8 1 formed continuously and integrally with the rear portion.
- the second reflecting surface 82 provided in the light source housing portion 81 of the reflecting mirror 80 is a rear side which is a first curved surface portion obtained by setting the center O of the light source to the center of the radius of curvature R.
- the center O a of the radius of curvature Ra passes through the cylindrical surface 32 and the upper connecting portion B 1 and the lower connecting portion B 2, respectively, and is located behind the center O of the light source (from the vertical connection portions B l and B 2).
- the upper and lower front curved surfaces 83, 84 which are the second curved surfaces, and the rear connecting surface B1 , B 2 and the center O of the light source extend tangentially from the first upper and lower intersections D l, D 2 where the extension of the line connecting the center O of the light source and the rear cylindrical surface 32 intersect.
- the pair of inclined planes 85, 86 showing a specific example of a pair of inclined sections developed to upper and lower front curved surfaces 83, 84 intersecting with a vertical plane 38 passing through.
- the center 0 & of the radius of curvature 1 & of the upper and lower front surfaces 8 3, 8 4 should preferably be the intersection point vertically lowered from the upper and lower first intersections D 1, D 2 to the center plane L.
- the light reflected by each front curved surface 83, 84 is radiated to the outside from the opening 13a by only one reflection by the rear cylindrical surface 32.
- the position of the center O a of the radius of curvature R a is not limited to this embodiment, and may be set from the center O a to a position close to the center O. Of course, it may be set at a position away from the center o.
- the position of the center O a of the radius of curvature R a is not only the case where the center O a of the light source is shifted to the side away from the connection points B 1 and B 2, but also the connection points B 1 and B 2 And the center O a of the radius of curvature R a may be set closer to the opening 13 a than the center O.
- the light source Of the light emitted from the connection tube 12 the light S 14 traveling toward the upper connecting portion B 1 (the same applies to the lower connecting portion B 2 in the same manner as the lower connecting portion B 2),
- the light is reflected by the upper connecting portion B 1, travels toward the center of the rear cylindrical surface 32, and can be reflected near the center.
- the reflected light reflected by the rear cylindrical surface 32 advances to the front side in accordance with the incident angle, and is reflected by one degree so that the aperture 13 a is within the range of the light distribution angle ⁇ .
- the light S 15 traveling from the center O to the upper vertical intersection C 1 (the same applies to the lower vertical intersection C 2). Is reflected at the upper vertical intersection C 1, travels toward the rear cylindrical surface 32, and is reflected near the center thereof.
- the reflected light reflected by the rear cylindrical surface 32 advances to the front side in accordance with the incident angle, and is also reflected by one degree to form the aperture 13 a within the range of the light distribution angle ⁇ .
- the light S 16 traveling from the center O of the xenon tube 12 to the upper first intersection D 1 (the same applies to the lower first intersection D 2) Is reflected at the intersection D 1 of the lower cylindrical surface 25 (toward the upper second reflective surface 24 in the case of the lower first intersection D 2), the rear cylindrical surface The light is radiated forward from the opening 13 a directly without being reflected by 32.
- the light reflected by the upper and lower front curved surfaces 83 and 84 is the upper and lower front curved surfaces.
- the direction of travel is changed to the front side by one reflection by 3 2.
- the upper and lower inclined plane portions 85 and 86 the light from the light source is directly changed to the front side since the reflection surface is a flat surface.
- the light reflected by the upper and lower front curved surfaces 83, 84 or the vertically inclined plane portions 85, 86 becomes light at one or two times in one or two times when the number of light reflections is extremely small. Radiated forward from a.
- the light reflection efficiency can be extremely increased.
- the rear ends of the upper and lower front curved surfaces 83 and 84 are formed by vertical and vertical intersections on a vertical surface 38 passing through the center O of the light source and perpendicular to the center plane L.
- C1 and C2 are applied
- the present invention is not limited to this embodiment, and the rear ends of the upper and lower front curved surfaces 83 and 84 are near the center O and the center O Of course, it may be located at a position slightly deviated from the opening 13 a to the side approaching the opening 13 a, or may be located at a position slightly deviated to the side away from the opening 13 a on the opposite side. It is.
- the invention of the present application does not make the portion inclined reversely to the reflecting surfaces 24 and 25 concentric with the xenon tube, but makes the reverse inclination stronger to allow the xenon tube to move from the xenon tube.
- the light striking the reverse slope is efficiently guided to the opening 13a.
- a pair of inclined plane portions 85 and 86 made of flat surfaces are applied as the pair of inclined portions, it goes without saying that a pair of curved curved surface portions may be used.
- FIGS. 10 and 11 show a digital still camera which is an image pickup apparatus showing an embodiment of an electronic device equipped with the electronic flash device 10 having the above-described configuration.
- the digital still camera 70 includes a camera case 71 having a built-in camera mechanism, and a lens cover 73 that movably covers the taking lens 72 of the force camera case 71.
- the camera case 71 is formed of a horizontally long hollow casing, and a viewfinder 74, an electronic flash device 10, and a lens system having a photographing lens 72 are arranged vertically on one side in the longitudinal direction of the front surface. ing.
- a lens cover 73 is attached to substantially the center of the camera case 71 so as to be able to slide in the longitudinal direction (lateral direction). By sliding the lens cover 73, the viewfinder 74, the protector 11 of the electronic flash device 10 and the photographing lens 72 are opened and closed almost simultaneously.
- a shutter button 75 is arranged on the upper surface of the camera case 71.
- a battery cover 76 is attached to one side of the camera case 71 so that a dry battery as a power supply can be taken in and out.
- a light source may be arranged at a predetermined position on the curved surface.
- the width of the opening is inevitably large due to the thickness of the lamp, but in the present invention, a pair of first and second reflecting surfaces are continuous. Since the connecting portion is set closer to the opening than the center of the light source, it is possible to increase the amount of light reflected by the second reflecting surface.
- the present invention relates to a strobe reflecting mirror for reflecting a light beam emitted from a light source on its reflecting surface, wherein the reflecting surface has a cross-sectional shape including a predetermined curve having an opening.
- the present invention can be applied as a tropo-reflecting mirror characterized in that it is configured so as to be located on the opening side from an imaginary line connecting a predetermined curve of the cross section of the reflecting surface.
- the cross section of the first reflecting surface has a curved surface composed of a predetermined curved line such as an ellipse or a parabola.
- a predetermined curved line such as an ellipse or a parabola.
- the lamp housing is provided, and the center of the lamp is located closer to the opening than the imaginary line. The light can be directed in a predetermined direction by the reflection surface.
- the present invention provides an imaging device including a photographing lens and a flash on a front surface, wherein the flash has a rod-shaped light source, and a reflecting mirror that reflects a light beam emitted from the light source on the reflecting surface,
- the cross-sectional shape of the reflecting surface includes a pair of opposing first reflecting surfaces each having a predetermined curved surface having an optical opening on the front surface of the imaging device, and a first light-receiving portion in which a light source is housed in a central portion.
- An imaging device comprising a second reflecting surface and a reflecting mirror in which a distance between a continuous portion of the first reflecting surface and the second reflecting surface is smaller than a diameter of the light source. Can be applied.
- the light source accommodating portion is provided, and the distance between the upper and lower continuous portions with the first reflection surface that radiates light from the light source in a predetermined external direction is smaller than the diameter of the light source.
- the opening since the opening is small, the surface that emits light from the light source to the outside in a predetermined direction can be made larger by the amount of the opening while reducing the opening.
- the imaging device can be made smaller.
- the electronic flash device 10 is applied to a digital still camera 70 as an electronic device using the electronic flash device 10
- the present invention is not limited to this.
- the present invention can be applied to various electronic devices using a camera-integrated video tape recorder, an analog still camera, a camera, a video camera with a still image capturing function, and other flash devices.
- the present invention can also be applied to a zoom type, a spot type, a close-up type, and the like. Furthermore, it can also be used for reflectors that use fluorescent lamps (hot cathode tubes, cold cathode tubes, etc.).
- the use of the above configuration of the present invention makes it possible to accurately determine the upper and lower light distribution angles, and to derive the angles based on experiments as in the past. Therefore, the time required for production can be shortened and the cost of the mold can be reduced.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Stroboscope Apparatuses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03772710A EP1564586B1 (en) | 2002-11-13 | 2003-11-12 | Reflector for electronic flashing device and electronic flashing device |
CN2003801084729A CN1735836B (zh) | 2002-11-13 | 2003-11-12 | 电子闪光装置用反射镜及电子闪光装置 |
US10/533,903 US7234845B2 (en) | 2002-11-13 | 2003-11-12 | Reflector for an electronic flash device and electronic flash device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-329852 | 2002-11-13 | ||
JP2002329852 | 2002-11-13 | ||
JP2003151190A JP4067451B2 (ja) | 2002-11-13 | 2003-05-28 | 電子閃光装置用反射鏡及び電子閃光装置 |
JP2003-151190 | 2003-05-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004046808A1 true WO2004046808A1 (ja) | 2004-06-03 |
Family
ID=32328296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/014378 WO2004046808A1 (ja) | 2002-11-13 | 2003-11-12 | 電子閃光装置用反射鏡及び電子閃光装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7234845B2 (ja) |
EP (1) | EP1564586B1 (ja) |
JP (1) | JP4067451B2 (ja) |
KR (1) | KR100981707B1 (ja) |
CN (1) | CN1735836B (ja) |
TW (1) | TWI239427B (ja) |
WO (1) | WO2004046808A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3877731B2 (ja) * | 2004-02-23 | 2007-02-07 | シャープ株式会社 | 密閉型光源装置とこれを用いた映像表示装置 |
US20060023457A1 (en) * | 2004-07-08 | 2006-02-02 | Leadford Kevin F | Luminaire utilizing reflecting and refracting optics |
WO2007017929A1 (ja) * | 2005-08-08 | 2007-02-15 | Shibakawa Mfg Co., Ltd. | 電子閃光装置用反射鏡 |
KR20070116435A (ko) | 2006-06-05 | 2007-12-10 | 삼성테크윈 주식회사 | 전자 섬광장치 |
JP2010509724A (ja) * | 2006-11-13 | 2010-03-25 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 物品の表面品質を検査する照明器具 |
CN101499400B (zh) * | 2008-01-31 | 2010-06-02 | 鸿富锦精密工业(深圳)有限公司 | 闪光灯 |
WO2009122364A1 (en) * | 2008-04-04 | 2009-10-08 | Philips Intellectual Property & Standards Gmbh | Projection module for a headlamp |
EP2355846A4 (en) | 2008-09-03 | 2013-06-19 | Univ Michigan State | THERMOSTABLE ENTEROXIN OF ESCHERICHIA COLI IMMUNOGENE |
JP2010097074A (ja) * | 2008-10-17 | 2010-04-30 | Stanley Electric Co Ltd | ストロボ装置 |
TWI396926B (zh) * | 2008-10-31 | 2013-05-21 | Hon Hai Prec Ind Co Ltd | 閃光燈模組 |
JP2011102897A (ja) * | 2009-11-11 | 2011-05-26 | Panasonic Corp | ストロボ装置及び撮像装置 |
MX2012006547A (es) * | 2009-12-08 | 2012-07-04 | 3M Innovative Porperties Company | Aparato y metodos de iluminacion para escanear de placa de crecimiento biologico. |
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- 2003-11-12 KR KR1020057008417A patent/KR100981707B1/ko not_active IP Right Cessation
- 2003-11-12 EP EP03772710A patent/EP1564586B1/en not_active Expired - Fee Related
- 2003-11-12 CN CN2003801084729A patent/CN1735836B/zh not_active Expired - Fee Related
- 2003-11-12 US US10/533,903 patent/US7234845B2/en not_active Expired - Fee Related
- 2003-11-12 WO PCT/JP2003/014378 patent/WO2004046808A1/ja active Application Filing
- 2003-11-13 TW TW092131803A patent/TWI239427B/zh not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
TW200422757A (en) | 2004-11-01 |
US20060028824A1 (en) | 2006-02-09 |
TWI239427B (en) | 2005-09-11 |
KR20050074597A (ko) | 2005-07-18 |
KR100981707B1 (ko) | 2010-09-13 |
CN1735836A (zh) | 2006-02-15 |
JP4067451B2 (ja) | 2008-03-26 |
JP2004212926A (ja) | 2004-07-29 |
EP1564586A1 (en) | 2005-08-17 |
EP1564586A4 (en) | 2009-07-01 |
US7234845B2 (en) | 2007-06-26 |
CN1735836B (zh) | 2011-06-08 |
EP1564586B1 (en) | 2011-07-20 |
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